Drive And Drive Gear Position Sensor - Ricoh G-P3 Service Manual

Photoconductor Unit

Drive and Drive Gear Position Sensor

6
The black OPC/development motor [F] controls the PCU for black.
The color development motor [A] controls the PCUs for magenta, cyan, and yellow. One motor controls
these three drums to help reduce the CMY color registration errors.
Mechanism
The machine uses the drum gear position sensors to detect if the drum motors turn. SC380 occurs when it
detects that the drum motor does not move. These sensors also help the machine to initialize the positions
of the gears when the main switch is turned on and at initialization. This prevents changes between printouts
in how the gears engage. This can cause changes in copy quality.
There is an actuator on each of the black [D] and magenta [B] drum gears. The drum gear position sensors
[C][E] detect the positions of these actuators. The sensors check that the two actuators are parallel. This
mechanism makes sure that output quality does not change. The cyan [G] and yellow [H] drum gears
operate with the magenta drum gear because these three drum gears are connected through other gears.
• In the ready condition, the two actuators are parallel. If they are not in a parallel position, the machine
adjusts the position of the black drum gear.
377